- All permanents on the battlefield.
- Sovereign Okinec Ahau does not have summoning sickness.
- Other creatures you control have total power 10 or greater.
- Activate Mossbridge Troll by tapping any other creatures you control except Sovereign Okinec Ahau with total power 10 or greater, giving Mossbridge Troll +20/+20 until end of turn.
- Declare Sovereign Okinec Ahau as an attacker.
- Sovereign Okinec Ahau triggers, putting twenty +1/+1 counters on Mossbridge Troll.
- Simic Ascendancy's first ability triggers, putting 20 growth counters on it.
- At the beginning of your next upkeep, Simic Ascendancy's second ability triggers, causing you to win the game.
- Win the game at the beginning of your next upkeep.